601561 has 4 divisors (see below), whose sum is σ = 604624. Its totient is φ = 598500.

The previous prime is 601543. The next prime is 601589. The reversal of 601561 is 165106.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 601561 - 2¹¹ = 599513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (601541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (151156).

2⁶⁰¹⁵⁶¹ is an apocalyptic number.

It is an amenable number.

601561 is a deficient number, since it is larger than the sum of its proper divisors (3063).

601561 is a wasteful number, since it uses less digits than its factorization.

601561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 601561 is about 775.6036358863. The cubic root of 601561 is about 84.4163475443.

Adding to 601561 its reverse (165106), we get a palindrome (766667).

The spelling of 601561 in words is "six hundred one thousand, five hundred sixty-one".